/Engine/Source/Runtime/Engine/Classes/GameFramework/GameModeBase.h
Check to see if we should start in cinematic mode
bool true if we should turn on cinematic mode, false if if we should not.
virtual bool ShouldStartInCinematicMode ( [APlayerController](API\Runtime\Engine\GameFramework\APlayerController) * Player, bool & OutHidePlayer, bool & OutHideHud, bool & OutDisableMovement, bool & OutDisableTurning )